Metal polishing advice

[olderdan]

In an ideal world Hans you are correct but at a hobby level we sometimes make do with what we have.
For first stage buffing I use a treated sisal wheel with black emery fast cutting, this wheel does not care which metal is being worked.
After that wheels should be separated for ferrous and non ferrous metals, wheels become loaded with particles which are not compatible, regular raking (old hacksaw blade in my case) is needed to clean before re-charging with media.
This is as far as I go with protocol but works for me.